Adding attachment for type-writers.



PATENTED APR. 26, 1904.

J. w. MAGNESS. ADDING ATTACHMENT FOR TYPE WRITERS.

APPLIOATION FILED AUG. 22, 1901.

L T B B H S s T E E H S 3 N0 MODEL.

INVENTOR WITNESSES %%/QZZW grfla/ v m: maul: runs co. unoraumu. vusmuamu. n. c.

No. 758,371. vlA'lliiNllFiD APR. 26, 1904. J. W. MAGNESS.

ADDING ATTACHMENT FOR TYPE WRITERS, APPLICATION nun um. 22, 1901.

no 1101121.. "1 11 a sums-Bum a QOQO' N wlmag s z 4 INVENTOR- I No. 758,371. 4 PATENTED APR. 26, 1904..

v Q J. W. MAGNBSS.

ADDING ATTAGHMENT FOR TYPE WRITERS.

' APPLICATION I'ILED AUG. 22, 1901.

l0 IODEL. 3 SHEETS-SHEET 3.

liming WITNESSES UNITED STATES Patented April 26, 1904.

PATENT ()rrion.

JOHN TV. MAGNESS, OF ST. LOUIS, MISSOURI, ASSIGNOR TO LEVY MAYBAUM, OF NEWARK, NEW JERSEY.

ADDING ATTACHMENT FOR TYPE-WRITERS.

SPECIFICATION formingpart of Letters Patent No. 758,371, dated April 26, 1904.

Application filed August 22, 1901. Serial No. 72,924. (No model.)

invented certain new and useful Improvements in AddingAttachments for Type-Writers, of

which the following is a specification.

My invention relates to type-writers, and

has for its principal object to provide a register therefor which will automatically add the various amounts tabulated in a vertical column and visibly indicate the aggregate of the detent-lever 4:2 with the toothed bar.

amounts tabulated in such column.

My invention comprises an adding-machine adapted to be actuated by the numeral-key levers of the type-writer. It also consists in the parts andin the arrangements and combinations of parts hereinafter described.

In the accompanying drawings, which form part of this specification, and wherein like symbols refer to like parts wherever they occur, Figure 1 is a front view of a type-writer provided with my attachment. Fig. 2 is a vertical section of the adding device on the line 2 2 of Fig. 4 looking. to the right. Fig. 2 is a detail view showing the device for limiting the band-hooks. Fig. 3 is a vertical section of the adding device on the line 3 3 of Fig. 4 looking to the left. Fig. 4 is a front view of the adding device. Fig. 5 is a detail view of the spring-detent mounted in one of the wheels of the adding device. Fig. 6 is an end elevation of the attachment and devices connected thereto. Fig. 7 is a detail view of the devices for transmitting motion from the paper-carrier to the adding device. Fig. 7 a is a detail view showing the engagement of the Fig. 8 is a detail view showing the connection of the numeral-key levers to the bar-lever which actuates the adding device. Fig. 9 is afragmentary view on the line 9 9 of Fig. 7.

My adding device comprises a series of gearwheels 1', loosely journaled upon a common axle 2 and provided with suitable means whereby each wheel will drive the next succeeding wheel one-tenth of its circumference forward for every revolution of its own. Each gearwheel 1 carries a drum 3, upon the circuma K ference of which are the figures O to 9.

which has a horizontal opening or window 5 therein for reading the numbers in horizontal alinement on the several drums. The general construction and arrangements are similar to those commonly used in registers.

In the construction shown in the accompanying drawings the axle 2, upon which the several gear-wheels 1 are journaled, is mounted on the frame 6 of the adding device, and theadjacent wheels are separated from each other by thin plates or partitions 7 mounted on the framework or casing. Upon the side of each gear-wheel is an annular series of ratchet-teeth 8, and on the side of the next adjacent drum is a bent pawl 9, pivoted in position to cooperate with said ratchet-teeth. Each partition 7 has a hole or slot 10 cut therethrough of proper size and in proper po-- sition to allow one end of the pawl of one wheel to engage the circular ratchet of the next succeeding wheel or drum and to drive it one-tenth of a revolution. In order to cause said pawl toengage said ratchet, anopening concentric with the shaft or axle is formed in said partition-plate, andthe other end of the pawl is pressed through said opening by means of a spring. A portion of the edge of this opening is formed in a straight line or spiral curve, so as to constitute a cam 11, against which said pawl bears and is turned on its pivot, so as to force the first-mentioned end of the pawl through the opening in the partition and into engagement with the corresponding ratchet teeth. This pawl and ratchet connection permits each wheel to be moved entirely independently of those on one side of it, but causes each wheel intermittently to turn the next adjacent wheel on the other side one step for each revolution of its own.

The motion of the gear-wheel is effected as follows: Each gear-wheel 1 meshes with one of a'series of gear-wheels 12, journaled loosely on a shaft or axle 18, mounted in the frame of the adding device. Each of these gear-wheels 12 has a drum 14.- separated therefrom. In-

.5 Said wheels are inclosed within a casing i,

side of each drum is a coil-spring 15, fastened at one end to the shaft Band at the other end to the drum 1 1, whereby said drum is automatically returned to its normal position by said spring. Upon each drum or gear-wheel is a spring which cooperates with a pivotal detent to form therewith a spring-pawl 16 in position to engage a ratchet-wheel 17, mounted on the corresponding drum 1 1. On the outside of each drum is fastened one end of a band 18, whose other end extends downwardly through an opening provided therefor in a bottom or partition plate 19 and is equipped with a hook or lateral projection 20 at its end and with a stop at said end to engage the bottom or partition plate. The retracting-springs keep the bands normally wound, so thatthe hooks rest in horizontal alinement slightly below the bottom or partition plate. When one of said hooks is pulled downwardly, it causes its drum 14: to turn, whereby the pawl 16 of said drum drives the corresponding gearwheel 12, which in turn drives the gear-wheel 1 and figure-drum 3. Vhen the pressure on the hook 20 is released, the spring 15 retracts the drum 14 and band 18, the pawl 16 sliding back freely over the ratchet teeth 17. The several hooks or lateral projections on the bands 16 are individually operated by a hook 21, mounted upon a bar 22, which slides in vertical guides 23, provided therefor on the type-writer frame 24. This last-mentioned hook 21 is in the same vertical plane as the series of hooks 20 on the bands; but it is at a higher elevation, whereby with the movement of the adding device each band-hook 20 in turn is brought under the overlapping actuatinghook 21. The bar 22, upon which this actuating-hook 21 is mounted, is connected by a link 25 to a lever 26, which lever is mounted on the framework of the type-writer. Each of the numeral-key levers 27 of the type-writer has a separate link 28, which is fastened to. a key-lever at one end and has a loop or hook 29 at its other end in position to overlap the bar-lever 26, whereby the downward movement of each numeral-key lever is transmitted to the bar-lever 26, while the bar-lever itself may move without producing any movement of any of the key-levers. The connections of the key-levers to the bar-levers are made at such points that the angular movements transmitted to the hook-bar 22 will be multiples of the movement thereof caused by the key-lever of the numeral 1. For this purpose it is obvious that the connections corresponding to the largest numeral will be closest to the fulcrum of the bar-lever, so as to cause a greater angular movement thereof for a definite length of cord.

In order to avoid having the bar-lever of undue length, it is preferable to arrange the loop 29 corresponding to the numeral .1, so

as to rest normally some distance above the bar-lever. By this arrangement the initial downward movement of this loop is lost and only the latter portion of such movement is effective in actuating the bar-lever.

By the foregoing arrangement the deprcs sion of any of the numeral-key levers 27 causes the bar-hook 21 to be pulled down wardly a single unit of distance or some multiple of this unit, according to the particular numeral key depressed. In order for this downward pull on the bar-hook to be effective on the adding device, the adding device must be in such position that said bar-hook overlaps one of the band-hooks 20 of the adding device, in which case the downward pull on the bar-hook will operate the particular register-wheel connected to the overlapping band-hook. For this purpose the adding device is mounted on horizontal guides 30 on the type-writer frame and is pulled along said guides parallel with the paper-carrier 31 by a coil-spring 32, mounted on the type-writer frame and connected to it by a cord or band 33. The movement of the adding device along its guides is made dependent upon that of the paper-carrier by the following arrangement: A short rack 34:, having at its lower end a base adapted to straddle the front bar of the typewriter carriage, is adjustably mounted thereon. The bar is provided with a series of recesses 46. The bosses on the base of the rack-bar has a perforation which may be brought into register with any one of the recesses 16. A pin 45 extends through the base 44 and into the perforation on the bar, and thus secures the rack 34: in any given position of adjustment. The short rack 34; meshes with a gear-wheel 35 on a short shaft 36, fixed to the frame of the type-writer. A second gear-wheel 37 on this shaft meshes with a rack 38 on said adding device, whereby the movement of the paper-carrier is transmitted through said gears to the adding device. As shown in the drawings, the gear 37, meshing with the rack on the adding device, is considerably larger than that moshing with the carrier-rack in order that the movement of the adding device may be greater than the short space traversed by the carrier, and thereby give room for the register mechanism. By this arrangement the adding device begins to move and space as soon as the rack on the frame of the wiper-carrier engages erative, the bar 22 is so mounted as to be capable of suflicient transverse movement to carry its hook clear of the series of band-hooks. For this purpose the guides 23, in which the bar 22 slides, is pivotally mounted and the end of the bell-crank lever 10 bears against said guide and serves as a cam for moving it.

In order to prevent the adding device being pulled by its actuating-spring when the carrier is temporarily lifted out of engagement with it, a rack or toothed bar 41 is mounted on the back of the frame of the adding device, and a detent-lever L2 is pivoted. on the type-writer frame in position to engage said rack. This detent-lever is connected by a link 43 to an actuating bell-crank lever 40 in position to be easily manipulated by the operator. In its normal position the detent 42 is clear of the rack; but when the lever 40 is raised the detent engages the rack and prevents movement of the adding device. I

Obviously my device admits of considerable modification without departing from myinvention. For instance, any suitable adding device may be substituted for that hereinbeforedescribed. Any device constituting a shifting operative connection betweenthe barlever and the bands may be substituted for the interlocking hooks, and the various connecting and locking devices may be modified considerably. I do not wish, therefore, to be restricted to the construction hereinbefore described.

What I claim is- 1. The combination with a type-writer, of a lever operatively connected to each of the numeral-key levers so as to be moved predetermined distances by them respectively, an adding device and means for transmitting motion from said levers to said adding device, said meanscomprising a hook connected to said first-mentioned lever and a series of hooks for cooperating therewith successively, said series of hooks being connected to the respective numeral-wheels, substantially as described.

2. The combination with a type-writer, of a lever operatively connected to the numeralkey levers, a register, and intermediate devices for transmitting motion from said levers to said register, saidintermediate devices being arranged to be rendered inoperative and comprising band-hooks operatively connected to the numeral-wheels and adapted to cooperate successively with a hook adapted to be actuated by the numeral-key levers, substantially as described.

3. The combinationwith a type-writer, of a lever operatively connected to the numeralkey levers, a register comprising a series of numeral-wheels, and intermediate devices for transmitting motion from said lever to said register, said intermediate devices comprising a series of hooks operatively connected to the respective numeral-wheels and a hook connected to said lever and arranged to interlock normally with each of said series of hooks but being movable to clear them, substantially as described.

4. The combination with a type-writer, of a lever operatively connected to each of the numeral-key levers to be moved different distances by them respectively, aregister having a series of numeral-wheels, and intermediate devices for transmitting motion from said lever to said register, said intermediate devices comprising a series of hooks operatively connected to the respective numeralwheels and a hook connected to said lever and arranged to interlock with each of said series of hooks, successively, substantially as described.

5. The combination with a type-writer, of an adding device arranged to be actuated by the numeral-key levers of the type-writer, racks mounted upon the type-writer frame and upon the adding device respectively, and a shaft fixed to the frame of the type-writer and carrying gear-wheels meshing with said racks, the rack on the type-writer frame being adjustable relatively thereto, substantially as described.

6. The combination with a type-writer, of an adding device arranged to be actuated by the numeral-key levers of the type-writer, racks mounted upon the type-writer frame and upon the adding device respectively, the rack upon the type-Writer frame being adjustable relatively thereto, and a shaft fixed to the frame of the type-writer and carrying gear-wheels meshing with said racks, the gear-wheel meshing with the rack on the adding device being of larger size than the gear-wheel on the typewriter frame, substantially as described.

7. The combination with a type-writer, of an adding device arranged to be actuated by the numeral-key levers of the type-writer, racks mounted upon the type-writer frame and uponthe adding device respectively, the rack upon the type-writer frame being adjustable relatively thereto, and a shaft fixed to the frame of the type-Writer and carrying gear-wheels meshing with said racks and a spring for retracting said adding device, substantially as described.

8. The combination with a type-writer, of an adding device arranged to be actuated by the numeral-key levers of the type-writer, the

frame of-the type-writer being provided with a detent adapted to cooperate with a rack on said adding device to prevent the accidental return of the adding device when the papercarrier is lifted out of engagement therewith, substantially as described.

9. The combination with a type-writer, of a lever operatively connected to the numeralkey levers, a register comprising a series of numeral-wheels, and intermediate devices for transmitting motion from said lever to said register, said intermediate devices comprising a series of hooks operatively connected to the to render it inoperative, substantially as dcrespective nmneral-wl1eels and a hook conscribed. nected to said lever and arranged to interlock St. Louis, Missourl, August 15, 1901.

normally with each of said series of hooks JOHN W. MAGNESS. but being movable to clear them, and means Witnesses: for moving the hook connecting said lever EDITH WV. SORGENFREY,

out of the plane of the series of hooks so as J AMES A. CARR. 

